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Laser induced plasma on copper target, a non-equilibrium model
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10.1063/1.4864647
/content/aip/journal/pop/21/2/10.1063/1.4864647
http://aip.metastore.ingenta.com/content/aip/journal/pop/21/2/10.1063/1.4864647

Figures

Image of FIG. 1.
FIG. 1.

Schematic description of the plasma expansion.

Image of FIG. 2.
FIG. 2.

Variation of the effect of the plasma shielding, for the 193 nm wavelength and a 8 ns pulse duration at different laser fluences.

Image of FIG. 3.
FIG. 3.

Variation of the temperature inside the material, for the 193 nm wavelength and a 8 ns pulse duration at different laser fluences.

Image of FIG. 4.
FIG. 4.

Ablation depth variation with time, for the 248 nm wavelength and a 21 ns pulse duration at different laser fluences.

Image of FIG. 5.
FIG. 5.

Comparison between the electronic and plume temperature in order to point out the importance of the electronic non-equilibrium in the laser induced plume, for 193 (8 ns) and 351 nm (17 ns), with a fluence of 3 J/cm2, Tg and Teg are the plume and electronic temperatures, respectively.

Image of FIG. 6.
FIG. 6.

Variation of the electronic and plume temperature, for 193 nm (8 ns) and 351 nm (17 ns), at a laser fluence of 4 J/cm2 and a time of 14 ns, Tg and Teg are the plume and electronic temperatures, respectively.

Image of FIG. 7.
FIG. 7.

Spatial variation of the pressure inside the laser induced plume, for 193 nm as a wavelength and 8 ns as a pulse duration at different laser fluences.

Image of FIG. 8.
FIG. 8.

Spatial variation of the velocity of the laser induced plume, for the 193 nm wavelength and a 8 ns pulse duration at different laser fluences.

Image of FIG. 9.
FIG. 9.

Spatial variation of the density of the excited copper atoms inside the laser induced plume, for the 193 nm wavelength and a 8 ns pulse duration at different laser fluences.

Image of FIG. 10.
FIG. 10.

Spatial variation of the density of the neutral copper atoms inside the laser induced plume, for the 193 nm wavelength and a 8 ns pulse duration at different laser fluences.

Image of FIG. 11.
FIG. 11.

Spatial variation of the density of the singly ionized copper atoms inside the laser induced plume, for the 193 nm wavelength and a 8 ns pulse duration at different laser fluences.

Image of FIG. 12.
FIG. 12.

Spatial variation of the density of the background gas, for the 193 nm wavelength and a 8 ns pulse duration at different laser fluences.

Image of FIG. 13.
FIG. 13.

Variation of the boiling temperature of the material, for the 193 nm wavelength and a 8 ns pulse duration at different laser fluences.

Tables

Generic image for table
Table I.

Material properties for both liquid and solid states.

Generic image for table
Table II.

Comparing our thresholds to experimental and theoretical ones for Cu targets, assuming the interaction occurring in vacuum, 19,20 , , and are the experimental, theoretical, and numerical thresholds, respectively.

Generic image for table
Table III.

Melting and evaporation thresholds for Cu targets.

Generic image for table
Table IV.

Effect of the atmospheric pressure on the plasmas ignition thresholds.

Generic image for table
Table V.

Plasma shielding maximum percentage for each one of the studied cases.

Generic image for table
Table VI.

Ablation depth for each one of the following wavelengths and pulse durations 193 nm (8 ns), 248 (30 ns), and 351 nm (17 ns) at different laser fluences, and are the times corresponding to the start and the end of the ablation process, respectively.

Generic image for table
Table VII.

Maximum plume and electronic temperature near the material surface, for each one of the following wavelengths and pulse durations 193 nm (8 ns), 248 (21, 30 ns), and 351 nm (17 ns), Tg an Teg are the plume and electronic temperatures, respectively.

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/content/aip/journal/pop/21/2/10.1063/1.4864647
2014-02-11
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Laser induced plasma on copper target, a non-equilibrium model
http://aip.metastore.ingenta.com/content/aip/journal/pop/21/2/10.1063/1.4864647
10.1063/1.4864647
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